/Engine/Source/Runtime/RHI/Public/DynamicRHI.h
Creates a compute fence. Compute fences are named GPU fences which can be written to once before resetting. A command to write the fence must be enqueued before any commands to wait on them. This is enforced on the CPU to avoid GPU hangs.
The new Fence.
FComputeFenceRHIRef RHICreateComputeFence ( const [FName](API\Runtime\Core\UObject\FName) & Name )